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Finding the Fourth Proportional to 636.45, 877.73 and 471.07

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Solution

The fourth proportional to 636.45, 877.73 and 471.07 is: 649.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.45 : 877.73 = 471.07 : x
  2. Step 2: Convert to fraction form
    636.45/877.73 = 471.07/x
  3. Step 3: Cross multiply
    636.45x = 877.73 × 471.07
  4. Step 4: Simplify right side
    636.45x = 413,472.27
  5. Step 5: Solve for x
    x = 413,472.27/636.45
  6. Step 6: Final answer
    x = 649.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.